Me: “I’m sorry ma’am, but it appears that the tree skirt is already on sale, so you can’t use the coupon.”

Customer: “Really? It doesn’t say anywhere that it’s on sale.”

Me: “Well, the ad that the coupon comes in also says that ‘All Christmas decorations’ are on sale for 30% off. Your coupon is for 40% off, so its not that big of a difference. It says on the coupon that you cannot use it on sale items…”

Customer: “Can’t you just give me the regular price and discount it with the coupon?”